Did this happen after the Windows Creators Update? If so, then the same thing happened to me so I should have a good idea of what to do. Also, what computer brand are you using? (I don’t think that was the right term to use but I meant HP, Del, Asus, etc).

Keep trying, never give up. In the end, you will find that it was all worth it

From the screenshot, it just looks like the antergos_grub entry got removed from the boot order. With a Dell computer, underneath the Boot Order, there is the option to add one or something like that. From there, I could find it.

Hope this helps!

Keep trying, never give up. In the end, you will find that it was all worth it

I’m sorry but I haven’t ever seen a BIOS like this before. However, for a normal ASUS computer, it looks like under the “Boot” option, there should be a choice titled “Add Boot Option”. From here, you can, well, add a boot option. Inside this should be antergos_grub since the Windows Creators Update only removed Grub from the list of Boot options, but it did not remove it or change it in any way.

I don’t exactly know how to do this on your BIOS, but I bet there is a command for it. Perhaps @joekamprad would know what this might be?

Keep trying, never give up. In the end, you will find that it was all worth it

Is it still set like shown in the screenshot?
May simply the update set serure boot back on? needs to be disabled. (if possible)
But if you use the same EFI-BOOT partition for both win/lin then it should be possible that the up
date remove the file from the partition, you can replace them by:
boot into Antergos-Life-ISO and follow the wiki here:

and you have 37 GB for / root and 187 GB /home from Antergos on Disco 1
… as far as i can see here…
The 37GB / Root partition should be mounted under /mnt
The FAT32 EFI-System Partition (100mb) should be mounted to /mnt/boot/efi
To see if it will help to recopy grub here you can check what is inside the /mnt/boot/efi folder after mounting it with nautilus (go to other places > system > mnt > boot > efi) and take a look if you find the ANtergos grub files inside or only windows related stuff.